/*底部菜单按钮*/
#menu{
    height: 60px;
    display: flex;
    box-shadow: 0 1px 1px gainsboro inset;/*向内的一像素的阴影*/
    opacity: .8; /*透明度*/
}

/*菜单聊天*/
.menu-div{
    width: 25%;
    display: flex;
    flex-flow: column nowrap; /*垂直显示 不换行*/
    justify-content: flex-end;/*居右*/
    align-items: center;/*垂直居中*/
}
.menu-div img{
    height: 23px;
    width: 23px;
    opacity: .7;
}

.font-menu{
    margin-top: 4px;
    font-weight: 200;
    font-size: 90%;
}